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빔 대칭

Equal dose distribution across the treatment field irradiated by the beam. In the Clinac, beam symmetry is monitored by comparing the dose distribution on symmetrically aligned pairs of collector plates in the ion chamber. If the beam is asymmetrical, the

Equal intensity over the entire area of a beam's column. Symmetry is measured in the ion chamber and is controlled by the angle and position steering coils.

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  • jis
  • (Mississauga, Canada)

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